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我正在將Objective-C代碼轉換爲Swift。在這裏，我們發現CommonCrypto在Swift中不可用。如何將通用加密代碼從Objective-C轉換爲Swift？
因此，我使用映射在我令人興奮的Swift項目中執行module.map文件並訪問Common Crypto文件。我已經將下面的Objective-C代碼寫入Swift。
但我面臨的代碼轉換問題。下面我寫了兩種語言代碼。 請注意，此SWIFT代碼包含錯誤。 這並不完美。請幫我解決Swift語言代碼。
Objective-C代碼：
- (NSData *) hashKey:(NSString *)hash{
unsigned char result[1000];
const char *cStr = [hash UTF8String];
CC_MD5(cStr, (CC_LONG)strlen(cStr), result);
for (int jval = 0, kval = 16; jval < 8;) {
result[kval++] = result[jval++];
}
return [NSMutableData dataWithBytes:result length:24];;
}
- (NSData *) myEncrypt:(NSString *)encryptData{
NSData *myKeyData = [self hashKey:MySecretKey];
NSData *myRawData = [encryptData dataUsingEncoding:NSUTF8StringEncoding];
size_t buffer_size = [myRawData length] + kCCBlockSize3DES;
void* buffer = malloc(buffer_size);
size_t num_bytes_encrypted = 0;
uint8_t iv[8] = { 56, 101, 63, 23, 96, 182, 209, 205};
CCCryptorStatus Crypto_status = CCCrypt(kCCEncrypt, kCCAlgorithm3DES, kCCOptionPKCS7Padding,
[myKeyData bytes],
kCCKeySize3DES,
iv,
[myRawData bytes],
[myRawData length],
buffer,
buffer_size,
&num_bytes_encrypted);
if (Crypto_status == kCCSuccess){
NSData *myResult = [NSData dataWithBytes:buffer length:num_bytes_encrypted];
free(buffer);
return myResult;
}
else {
free(buffer);
return nil;
}
}
- (NSData *) myDecrypt:(NSData *)decryptData{
NSUInteger mydata_len = [decryptData length];
NSData *keyData = [self hashKey:MySecretKey];
size_t buffer_size = mydata_len + kCCBlockSizeAES128;
void* buffer = malloc(buffer_size);
size_t num_bytes_encrypted = 0;
uint8_t iv[8] = { 56, 101, 63, 23, 96, 182, 209, 205};
CCCryptorStatus decrypt_status = CCCrypt(kCCDecrypt, kCCAlgorithm3DES, kCCOptionPKCS7Padding,
[keyData bytes],
kCCKeySize3DES,
iv,
[decryptData bytes],
mydata_len,
buffer,
buffer_size,
&num_bytes_encrypted);
if (decrypt_status == kCCSuccess){
NSData *myResult = [NSData dataWithBytes:buffer length:num_bytes_encrypted];
free(buffer);
return myResult;
}
else {
free(buffer);
return nil;
}
}
Swift代碼：
func hashKey(hash:String) -> NSData{
let digestLength = Int(CC_MD5_DIGEST_LENGTH)
let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLength)
var cStr = hash.cStringUsingEncoding(NSUTF8StringEncoding)
var strLen = CC_LONG(strlen(cStr!))
CC_MD5(cStr!, strLen, result)
var kval = 16
for (var jval=0; kval==16; jval<8){
result [kval++] = result[jval++] ***//Here We Got An Error: Cannot assign a value of type 'CUnsignedChar' to a value of type '[Int]'***
}
return NSMutableData(bytes: result, length: 24)
}
func myEncrypt(encryptData:String) -> NSData?{
var myKeyData : NSData = self.hashKey(MySecretKey)
var myRawData : NSData = encryptData.dataUsingEncoding(NSUTF8StringEncoding)!
var buffer_size : size_t = myRawData.length + kCCBlockSize3DES
var buffer = UnsafeMutablePointer<NSData>.alloc(buffer_size)
var num_bytes_encrypted : size_t = 0
var iv : [UInt8] = [56, 101, 63, 23, 96, 182, 209, 205]
let operation: CCOperation = UInt32(kCCEncrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithm3DES)
let options: CCOptions = UInt32(kCCOptionPKCS7Padding)
let keyLength = size_t(kCCKeySize3DES)
var Crypto_status: CCCryptorStatus = CCCrypt(operation, algoritm, options, myKeyData.bytes, keyLength, iv, myRawData.bytes, myRawData.length, buffer, buffer_size, &num_bytes_encrypted)
if UInt32(Crypto_status) == UInt32(kCCSuccess){
var myResult: NSData = NSData(bytes: buffer, length: num_bytes_encrypted)
free(buffer)
return myResult
}else{
free(buffer)
return nil
}
}
func myDecrypt(decryptData : NSData) -> NSData?{
var mydata_len : Int = decryptData.length
var keyData : NSData = self.hashKey(MySecretKey)
var buffer_size : size_t = mydata_len+kCCBlockSizeAES128
var buffer = UnsafeMutablePointer<NSData>.alloc(buffer_size)
var num_bytes_encrypted : size_t = 0
var iv : [UInt8] = [56, 101, 63, 23, 96, 182, 209, 205]
let operation: CCOperation = UInt32(kCCDecrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithm3DES)
let options: CCOptions = UInt32(kCCOptionPKCS7Padding)
let keyLength = size_t(kCCKeySize3DES)
var decrypt_status : CCCryptorStatus = CCCrypt(operation, algoritm, options, keyData.bytes, keyLength, iv, decryptData.bytes, mydata_len, buffer, buffer_size, &num_bytes_encrypted)
if UInt32(decrypt_status) == UInt32(kCCSuccess){
var myResult : NSData = NSData(bytes: buffer, length: num_bytes_encrypted)
free(buffer)
return myResult
}else{
free(buffer)
return nil
}
}
使用橋接頭的問題是什麼？ –
@iOSDev我也是這麼做的。但是，當解密時，我剛剛得到**零作爲解密文本。你能告訴我如何解密數據 –